Commercial-grade proline residential water heaters
The commercial-grade ProLine family of residential water heaters features a range of models suitable for most residential applications. The products are available in three categories: ProLine comes with commercial-grade parts and reliability; ProLine Master comes with high-end components, including dual stainless steel elements and increased anode protection, along with extended eight-year warranty coverage in both electric and gas models; ProLine XE comes with high performance and energy efficiency. Some commercial-grade features include: Blue Diamond glass tank lining, CoreGard stainless steel core anode rods, longer-lasting stainless steel electric elements and full-flow brass drain valves. A.O. Smith.